Fly and dust proof show-case.



W. R. KIRK. FLY AND DUST PROOF SHOW OASE. PPLIGATION FILED MAB. 31, 190e.

fatemi-,ed Dag. 22, i908.

n J www 2% WLLAC R.`KIRK, OF KANSAS CITY, MISSOURI, ./-ISSIGNOR ONE-HALF TO JAMES 0.

SANDERS, OF KANSAS CITY, MISSOURI.

no. omnes.

Specification of Letters Patent. i

y .patented nec. as, 190s.

:To all 'whom it' may concern:

Be it known that I, WALLACE R. Kinn, a citizen of the United States, residing at Kansas City, in the county oi Jackson and State of Missouri, have invented certain new and useful Improvements in lily and Dust iroof Show-Cases, of which the lfollowing is a speciiication.

rl`his invention relates to 'fly and dust proof show cases, andmy object is to produce ineans for establishing a blast of air and automatically substituting the same for a door oi the case when said door is partly or wholly openedl and thus prevent lies or dust or other foreign matter entering the case and contaminating or soiling the contents thereof.

A further object is to produce an air blast attachment for show cases which may torni an integral part of a show case structure or which may be applied as an attachment to any of the approved types of show cases now in use.

lilith these general objects in view and others as hereinafter appear, the invention consists in certain novel and peculiar features ot' construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawing, in whichligure 1, is a vertical 'longitudinalsection of a show case embodying my invention, the

- section being taken on the line I-I of i ig. 3.

lig. 2, is a top plan view oi' a portion of said show case. lfig. 3, is a section talren on the line III-III of l. ig. l. lig. 4, is an enlarged vertical section of one of the air con'- dtits of the case and the sheath thereof carried by the adjacent door.

In the saiddrawings, 1 indicates a show case of the type shown or of any other spitable or preferred type. 2 and 3 are the lower and Lpper bars of the rear side or wall of the case traine and 4 are longittdinal grooves in said bars for the sliding doors 5, the case shown disclosing two end doors in the same vertical plane and a middle door in a vertical` plane rearward of the end doors. A supply pipe 6 leading from a blower or eqrivalen't device, not shown, is arranged by preference, below and near the rear wall ofv the case and where the latter is provided with three doors arranged as explained, is providedwith two T-icouplings 7 arranged A:servertically and a T-coiipling 8 arranged horizontally, the iirst-named "1T -couplings beingv preferably equipped with short tubes 9 projecting u ward into the case at'its rear corners. T ie coupling 8 is provided with a rearwardly projecting pipe 10, communicating with a vertically arranged elbow 11 having its upper end disposed rearward of the middle door.

12 indicates stand pipes projecting upward from tubes 9 and the elbow 11 and provided at their upper ends contiguous to the upper edges ot the doors with horizontally arranged tubular extensions 13 provided in their lower sides with longitudinal series of orifices 14.

15 are angle brackets secured to the inner sides by preference, of the end sliding doors, similar' ones being secured to the middle sliding door, and rigidly secured to said brackets are tubular sheaths 16 fitting telescopically upon their respective pipes 13, and closing the orifices 14.

In the preferred construction, the terminals of the extensions 13 are closed as shown in i: ig. 4 most clearly, and the sheaths are equipped near each end with internal compressible rings of rubber or equivalent material 17, which establish an air-tight relation between the sheaths and the extensions inprovided with a cap 1S at its inner end.

,l/Vhen the doorsv are closed as shown, the I sheaths prevent the escape of air from extensions I3. moved endwise to give access tothe interior When either of the doors -is of the case, the sheath of such door is moved telescopically upon its extension and eX- poses some or all of the orifices 14 and as aresulta blast of ai escapes therefrom and forms a wall of air in place of the door. rlhese walls of air from the extensions within the case are cai sed to extend downwardly and ontwardly by disposing the oriices of the extensions slightly rearward of the longitudinal center of the latter, as will t e readily understood, it being desirable of course that the air from the extensions within the case shall be cai` sed to pass out 'of the door openings withont ccntact with thev articles within the case so as to avoid effecting the evaporation oi the inois1're which such articles may contain, reference being had particularly to bal'ery predicts and other products which deteriorate if subjected to air vourrents. .-The orifices of the', extensions rearward oi the oase are so disposedly preference, as to discharge the air downward past the door opening wither t entering tle latter.

By the arrangement deseri`. ed of tlze dis,- charge ends of the cond', its, as portions 1'25 may l e termed, a tlin wall of air is estahlis' ed whenever the door is opened, the width of the llast cerrespending approximately of coL rse to the distancewhlch the doorvis moved. This lilast or crrrent of air acts as a wall to prevent flies or d: st entering the case, it leing of ooi rse i nden stood that it will not interfere with the placing of articles in or removing articles from the ease, and that if anarticle is so light as to le affected ty the air errrent the operator can hold it intil it has passed heyond the plane ot the hlast or ci rrent.

To avoid any ossil ility ot air collecting` in either of the slieatls tending to resist the closing of its respective door or to open srch door, each cap 18 is provided with a vent hole 19, through which air is free to ass in and ont in the operation olr the door, 1t teing inrther noted 1n the preferred oonstnzction as shown, that hy the use of the con'lpressihle rings each sheath is centralized with respect to its respective extension 13 on which it operates telescopieally, said rings as hereinltefore stated establishing air-tight eonneetions and at the same time redtoing the friction between the extensions and the sheaths far 'zelow that which would exist if the sheath 'fitted with an airtight relation for its full length on the extension.

l' rom the ahove description it will ,he apparent that ll have Jrodi ced ally and di st proof show case einhodying the features of advantage enumerated as desirahle and I wish it to be understood that I reserve the right to maire auch ehanges as properly tall within the spirit and scope or" the appended Claims.

Having thlis deserihed the invention what elaim new and desire to secure by lietters-Patent isz i. A show ease having a door opening, a t i (hit arranged contigrois to said opening ooor controlling said opening, an air con-I eo'neea i and adapted to direct a thin hlast of air across said opening, and sheath movahle with tle door and adapted to act as a elos re lor tlze discharge end of the eondiit when the door is closed and to entirely or partly expose said discharge end when the door is wholly or partly opened.

2. A show case having,i a door opening, 'a door controlling said opening, an air condi it arranged eoni'igrri oi s to said opening and adapted to eireet thin i hist air across said opening, an( a sheath inovahle witl the door and ilttiin idingly -upon the discharge end of the cond-i it and adapted io act a closure for the ia ter when 'the door Closed and to entir .'iy expose said discharge end wh n i; wholly or partly ooened.

3. A show 'case having a door opening, a slide door controllingN said opening, and an air condi it having a discharge portion arranged contisgi o1 s to one margin of the oieningr and adapted to discharge a thin sneet of air past the saine, and a sheath litting teleseopieally upon the discharge portion ot' the eondiit amr forming a closnre therefor when the door is elosed and seemed to the latter to slide einen said discharge end as the door is ooened or closed.

fi, rihe comlination `with a show ease having an opening, and a slide door eon trolling the saine, an an' condi it having an extension disposed sidstantialiy parallel with and near the rapper margin of the opening provided with orifices adapted to discharge downwardly and rearwardly through said opening, and a sheath carried hy door and tilting telescopieaily upon the extension of the condi it and when the door is closed, covering all of the oriiiees and when the door is opened, exposing seine or all of steh oritiees. y

In testimony whereof afin; my signature, in the presence of two witnesses A 'WLLACE it. KRK. 

